As usual, I decided to add all the numbers together for fun.
For 2010, the total was £1,152,798 million, and for 2010, the total was £1,187,211 million. In other words, well over £1 trillion for each year.
Now, don't forget that share trading in the UK is subject to a 0.5% Financial Transaction Tax. It's Stamp Duty, which has been charged since 1986. Amazingly, it hasn't stopped people trading. Funny that, when you hear people saying that even a 0.005% tax on any other financial transactions would be a catastrophe.